| Acknowledgements | 第1-5页 |
| Abstract | 第5-7页 |
| 摘要 | 第7-11页 |
| List of Tables and Figures | 第11-12页 |
| Chapter 1 Introduction | 第12-17页 |
| ·The motivation of the research | 第12-13页 |
| ·The rationale of the research | 第13-15页 |
| ·The objectives of the research | 第15页 |
| ·Layout of the thesis | 第15-17页 |
| Chapter 2 Literature Review | 第17-30页 |
| ·A Brief Introduction to the relevant cognitive theories | 第17-20页 |
| ·Categorzation and category | 第17-18页 |
| ·Prototype theory | 第18页 |
| ·Image schema | 第18-19页 |
| ·Conceptual metaphor | 第19-20页 |
| ·Studies on polysemy learning and teaching | 第20-24页 |
| ·The general understanding about polysemy | 第20-21页 |
| ·A cognitive approach to polysemy | 第21-24页 |
| ·A review of the studies on English idioms | 第24-29页 |
| ·The definition and general understanding of English idioms | 第24-26页 |
| ·Other relevant studies | 第26-29页 |
| ·smmary | 第29-30页 |
| Chapter 3 Methodology | 第30-41页 |
| ·Research questions | 第30页 |
| ·Subjects | 第30-31页 |
| ·Instruments | 第31-33页 |
| ·The National College Entrance Examination | 第31-32页 |
| ·Pre-tese | 第32页 |
| ·Post-tests | 第32-33页 |
| ·Treatment | 第33-38页 |
| ·Control group | 第33-35页 |
| ·Experimental groups | 第35-38页 |
| ·Data collection and analysis procedures | 第38-40页 |
| ·Summary | 第40-41页 |
| Chapter 4 Results and Discussion | 第41-55页 |
| ·Polysemy instruction and lexical competence | 第41-48页 |
| ·Subjects' language competence | 第41-42页 |
| ·Subjects' lexical level from pretest | 第42-44页 |
| ·Subjects' lexical competence after the instruction | 第44-48页 |
| ·Polysemy instruction and idiom acquisition | 第48-51页 |
| ·Basic information about the two experimental groups | 第48-49页 |
| ·Correlation between polysemy instruction and idiom acquisition | 第49-50页 |
| ·Polysemy instruction's positive effect on idiom acquisition | 第50-51页 |
| ·Relationship between different teaching method and effect in idiom acquisition | 第51-54页 |
| ·Basic information for the two experimental groups from the two tests | 第51-52页 |
| ·Performance of both EGs after polysemy instruction | 第52-53页 |
| ·No difference yielded under different teaching methods | 第53-54页 |
| ·summary | 第54-55页 |
| Chapter 5 Conclusion | 第55-60页 |
| ·Major findings | 第55-56页 |
| ·Pedagogical implications | 第56-57页 |
| ·Limitations of the study and suggestions for future research | 第57-58页 |
| ·Summary | 第58-60页 |
| Works Cited | 第60-68页 |
| Appendices | 第68-73页 |
| Appendix A Pretest | 第68-71页 |
| Appendix B Post-test | 第71-73页 |
| Publications | 第73页 |
